Method of Salaah

Q: How long is it waajib for jalsah in salaah?

Q: In s​alaah after ruku while standing when one is reading rabana walakal hamd. Is salaah valid if most of rabana walakal hamd was read standing and maybe a little while moving down? If not and one just bent his knees a bit and moved his hands forward, then is it valid? 

Q: If one has to recite only one Ayah in a rakat of a Salah how long it should be?

Q: It is mentioned that a person's dua will be answered if he makes duaa after the fardh salaah. Does this mean that he should make dua after the fardh of the salaah or after the entire salaah is completed?

Q: In the last rakaat, in tashahhud, after at tahiyyaat, my wudhu broke, is my namaaz done?

Q: I was raised in a Hanafi family and I pray my salat according to the Hanafi school. But recently I found out that prophets prayer was a little bit different than the way Hanafis pray. For example, Hanafis DONT raise their hands before going to the Rukuh and while straightening up from the Rukuh. So I was thinking should I start praying like the way Hanbalis pray? I go to a Hanafi masjid. Can I pray like this over or should I act like a pure Hanafi?

Q: What are the dua's whilst in sajdah?

Q: A person does forget one the fard acts of salaah and remembers this after the time for that prayer expired. A fatwa was writing that is mustahab to repeat the prayer. Pleasr give your input.

Q: Can Surah Ikhlass be recited in the first rakaat and either Surah Falaq or Surah Naas in the second rakaat?

Q: What about specifically misprounincing the letter ذ as ز , ظ or the letter ث as س , ص ? For non-arabs the letters ذ , ظ , and ث are quote difficult to pronounce since these letters are prounounced with a lisp i.e bringing the tongue between the upper and lower teeth when pronouncing it. So the non-arabs because they are not used to the lisp sound read the same representative lettersound without the lisp. In such case is the salaah invalid either intentionally or unintentionally?